/* 앱 셸: 헤더(상단 전폭) · 사이드바(좌) · 콘텐츠 · 푸터(하단 전폭). 모바일 우선 */
:root { --header-h: 56px; }

.shell { display: grid; grid-template-rows: var(--header-h) 1fr auto; grid-template-columns: 1fr; min-height: 100vh; }
.shell__header { grid-row: 1; grid-column: 1 / -1; }
.shell__sidebar { grid-row: 2; grid-column: 1; }
.shell__main { grid-row: 2; grid-column: 1; min-width: 0; padding: var(--space-4) var(--space-3) var(--space-6); display: flex; flex-direction: column; gap: var(--space-5); }
.shell__footer { grid-row: 3; grid-column: 1 / -1; }

/* 헤더 */
.topbar {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-3);
  padding: 0 var(--space-3); background: var(--surface); border-bottom: 1px solid var(--border);
}
.topbar__left, .topbar__right { display: flex; align-items: center; gap: var(--space-2); min-width: 0; }
.topbar__left { flex: 1; }
.topbar__right { flex: 0 0 auto; }
.topbar .brand__name { font-size: 16px; }
.topbar .brand__mark { width: 26px; height: 26px; }
.topbar .brand__eng { display: none; }
.topbar .lang-select { display: none; }
.sidebar .lang-select { display: block; padding: 0 var(--space-3) var(--space-3); }
.sidebar .lang-select__input { width: 100%; background-color: transparent; color: var(--sidebar-ink); border-color: var(--sidebar-border); }
.quota__label { display: none; }
.quota { display: inline-flex; align-items: baseline; gap: 6px; padding: 6px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-ink); text-decoration: none; white-space: nowrap; }
.quota__label { font-size: 11px; }
.quota__value { font-size: 13px; font-weight: 700; }
.quota__value small { font-size: 11px; font-weight: 400; }
.account { display: none; align-items: center; gap: var(--space-2); }
.sidebar__account { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); padding: var(--space-2) var(--space-3) var(--space-3); margin-bottom: var(--space-2); border-bottom: 1px solid var(--sidebar-border); color: #fff; font-size: 13.5px; font-weight: 500; }
.account__avatar { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }
.account__avatar--initial { display: inline-flex; align-items: center; justify-content: center; background: var(--sidebar); color: #fff; font-weight: 700; }
.account__name { font-size: 13px; font-weight: 500; white-space: nowrap; }
.account__avatar { display: none; }
.account__logout { display: none; }
.lang-select__input { min-height: 32px; padding: 0 22px 0 8px; border: 1px solid var(--border); border-radius: var(--radius-s); background: var(--surface); color: var(--ink); font-size: 12.5px; appearance: none; -webkit-appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 12px) 13px, calc(100% - 8px) 13px; background-size: 4px 4px; background-repeat: no-repeat; }
.lang-select__input:hover { border-color: var(--accent); }

/* 사이드바: 모바일에서는 드로어 */
.sidebar {
  position: fixed; top: var(--header-h); bottom: 0; left: 0; z-index: 25; width: 240px;
  background: var(--sidebar); color: var(--sidebar-ink); border-right: 1px solid var(--sidebar-border);
  transform: translateX(-100%); transition: transform .2s ease; padding: var(--space-3);
}
.sidebar.is-open { transform: none; }
.sidebar-backdrop { position: fixed; inset: var(--header-h) 0 0 0; z-index: 20; background: rgba(0,0,0,.4); }
.side-nav { display: flex; flex-direction: column; gap: 2px; }
.side-nav__item {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: var(--radius-s);
  color: var(--sidebar-muted); text-decoration: none; font-size: 14px; border: 1px solid transparent;
}
.side-nav__icon { width: 18px; height: 18px; opacity: .85; }
.side-nav__item.is-active .side-nav__icon { opacity: 1; color: var(--accent-strong); }
.side-nav__item:hover { color: #fff; }
.side-nav__item.is-active { background: rgba(217,115,13,.16); color: #fff; border-color: rgba(217,115,13,.35); }
.side-nav__toggle { width: 100%; background: none; cursor: pointer; text-align: left; font: inherit; }
.side-nav__chev { margin-left: auto; width: 16px; height: 16px; transition: transform .15s; }
.side-nav__group.is-open .side-nav__chev { transform: rotate(180deg); }
.side-nav__sub { display: none; flex-direction: column; gap: 2px; padding-left: 14px; margin-top: 2px; border-left: 1px solid var(--sidebar-border); margin-left: 20px; }
.side-nav__group.is-open .side-nav__sub { display: flex; }
.side-nav__item--sub { padding: 8px 10px; font-size: 13px; }
.side-nav__item--sub .side-nav__icon { width: 16px; height: 16px; }

/* 푸터 */
.footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-2); padding: var(--space-4) var(--space-3); border-top: 1px solid var(--border); font-size: 12px; color: var(--muted); }

@media (min-width: 768px) {
  .shell { grid-template-columns: 240px 1fr; }
  .shell__sidebar { grid-column: 1; }
  .shell__main { grid-column: 2; padding: var(--space-6) clamp(20px, 4vw, 40px) var(--space-8); }
  .topbar { padding: 0 var(--space-5); }
  .topbar__menu { display: none; }
  .topbar .brand__name { font-size: 20px; }
  .topbar .brand__mark { width: 30px; height: 30px; }
  .topbar .brand__eng { display: inline; }
  .topbar .lang-select { display: block; }
  .sidebar .lang-select { display: none; }
  .quota__label { display: inline; }
  .account { display: flex; }
  .account__avatar { display: inline-flex; }
  .account__logout { display: block; }
  .sidebar__account { display: none; }
  .sidebar { position: sticky; top: var(--header-h); height: calc(100vh - var(--header-h)); transform: none; transition: none; padding: var(--space-4) var(--space-3); }
  .sidebar-backdrop { display: none !important; }
  .footer { padding: var(--space-4) clamp(20px, 4vw, 40px); }
}

/* ===== UX v2: 헤더 계정 메뉴 · 사이드바 하단 메뉴 · 잔액+구매 ===== */
.quota__buy { font-size: 11px; font-weight: 600; padding-left: 6px; border-left: 1px solid rgba(0,0,0,.15); }
.account--menu { position: relative; display: flex; }
.account__btn { display: inline-flex; align-items: center; gap: 8px; padding: 4px 6px 4px 4px; border: 1px solid transparent; border-radius: 999px; background: transparent; color: var(--ink); cursor: pointer; }
.account__btn:hover { border-color: var(--border); background: var(--bg); }
.account__chev { width: 14px; height: 14px; color: var(--muted); }
.account__menu { position: absolute; right: 0; top: calc(100% + 6px); min-width: 220px; padding: 6px; border: 1px solid var(--border); border-radius: var(--radius-m); background: var(--surface); box-shadow: 0 10px 30px rgba(0,0,0,.15); z-index: 50; display: grid; }
.account__menu a, .account__menu button { display: flex; align-items: center; gap: 8px; width: 100%; padding: 8px 10px; border: 0; border-radius: var(--radius-s); background: transparent; color: var(--ink); font: inherit; font-size: 13.5px; text-align: left; text-decoration: none; cursor: pointer; }
.account__menu a:hover, .account__menu button:hover { background: var(--bg); }
.account__menu form { display: contents; }
.account__meta { display: grid; gap: 2px; padding: 8px 10px 10px; margin-bottom: 4px; border-bottom: 1px solid var(--border); font-size: 12.5px; color: var(--muted); }
.account__meta strong { color: var(--ink); font-size: 13.5px; }
.account--menu .account__name { max-width: 160px; overflow: hidden; text-overflow: ellipsis; }
.sidebar { display: flex; flex-direction: column; }
.side-nav--bottom { margin-top: auto; padding-top: var(--space-3); border-top: 1px solid var(--sidebar-border); }
@media (max-width: 1023px) { .account--menu .account__name, .account__chev { display: none; } .account--menu { display: flex; } .account__avatar { display: inline-flex; } }

/* ===== 사이드바 접기 (데스크톱): 아이콘만 남기고 작업영역 확보 ===== */
.sidebar__collapse { display: none; align-items: center; gap: 8px; width: 100%; margin-bottom: var(--space-2); padding: 8px 12px; border: 1px solid transparent; border-radius: var(--radius-s); background: none; color: var(--sidebar-muted); font: inherit; font-size: 13px; cursor: pointer; }
.sidebar__collapse:hover { color: #fff; background: rgba(255,255,255,.06); }
.sidebar__collapse .icon { width: 18px; height: 18px; flex: 0 0 auto; }
@media (min-width: 768px) {
  .sidebar__collapse { display: flex; }
  body.is-collapsed .shell { grid-template-columns: 64px 1fr; }
  body.is-collapsed .sidebar { width: 64px; padding: var(--space-3) 10px; }
  body.is-collapsed .sidebar__collapse { justify-content: center; padding: 8px 0; }
  body.is-collapsed .sidebar__collapse span,
  body.is-collapsed .side-nav__item > span,
  body.is-collapsed .side-nav__chev { display: none; }
  body.is-collapsed .side-nav__item { justify-content: center; padding: 10px 0; }
  body.is-collapsed .side-nav__sub { padding-left: 0; margin-left: 0; border-left: 0; }
  body.is-collapsed .side-nav__item--sub { padding: 8px 0; }
  body.is-collapsed .side-nav__group .side-nav__toggle { display: none; }   /* 그룹 제목은 숨기고 하위 아이콘만 */
  body.is-collapsed .side-nav__group .side-nav__sub { display: flex; margin-top: 0; }
  body.is-collapsed .side-nav__group { padding-top: 4px; border-top: 1px solid var(--sidebar-border); margin-top: 4px; }
}